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US 2013/0210545 A1Published application
Multi-Core Golf Ball Having Increased Initial Velocity
AssigneeNIKE, Inc.
InventorsHideyuki Ishii, Yasushi Ichikawa, Arthur Molinari, Chien-Hsin Chou, Chin-Shun Ko, Chen-Tai Liu, Jun Ichinose
Life of this patent
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Abstract
A golf ball having certain relationships and values of its initial velocities at various club head speeds is provided. The golf ball may achieve an initial velocity of at least about 173 mph at a club head speed of about 125 mph, therefore achieving an increased total shot distance. The golf ball has multiple layers making up its core, and the golf ball may be a four piece golf ball.
Claims20
A golf ball comprising:
- an inner core, the inner core being formed primarily of at least one thermoplastic highly neutralized polymer;
- an outer core layer, the outer core substantially surrounding the inner core and comprising a thermoset rubber;
- and
- at least one cover layer;
- wherein the inner core has a compression deformation of from about 3.5 mm to about 4.1 mm, the outer core layer has a compression deformation of from about 2.7 mm to about 3.3 mm, and a ratio of the compression deformation of the inner core to the compression deformation of the outer core layer is from about 1.1 to about 1.3;
- and
- the golf ball has an initial velocity measured at a club head speed of about 125 mph of at least about 174 mph, and the golf ball has a COR of at most about 0.80.
4 more elements
A golf ball comprising:
- an inner core, the inner core being formed primarily of at least one thermoplastic highly neutralized polymer, and the inner core has a diameter of from about 20 mm to about 26 mm;
- an outer core layer, the outer core substantially surrounding the inner core and being made primarily of a thermoset rubber, and the outer core layer has a thickness of from about 5 mm to about 9 mm;
- an inner cover layer, the inner cover layer substantially surrounding the outer core layer;
- and
- an outer cover layer, the outer cover layer substantially surrounding the inner cover layer;
- wherein the inner core has a compression deformation of from about 3.5 mm to about 4.1 mm, the outer core layer has a compression deformation of from about 2.7 mm to about 3.3 mm, and a ratio of the compression deformation of the inner core to the compression deformation of the outer core layer is from about 1.1 to about 1.3;
- the inner core having a first COR, the outer core having a second COR, the second COR being greater than the first COR and having a value of at least 0.8;
- and
- wherein the golf ball has an initial velocity measured at a club head speed of about 125 mph of at least about 174 mph.
6 more elements
A golf ball comprising:
- an inner core, the inner core consisting essentially of at least one highly neutralized polymer;
- an outer core layer, the outer core substantially surrounding the inner core and being made primarily of a thermoset rubber;
- and
- an inner cover layer, the inner cover layer substantially surrounding the outer core layer;
- and
- an outer cover layer, the outer cover layer substantially surrounding the inner cover layer;
- wherein the golf ball has an initial velocity measured at a club head speed of about 125 mph of at least about 174 mph.
4 more elements
Dependencies are inferred from the claim text.